Lucky you on getting the tools. I think you've done enough to ensure good hygiene and cleaning tools after use is just good husbandry and makes them last longer and work better.
My tools hang on the wall in the shed so I have been in teh habit of rinsing them off after a session and occasionally a squirt of WD40 on blades of trowels and spades. They all get a good clean and oiling to see them through winter. I think it helps keep the business end in good nick.
OH doesn't bother so I can always see which tools he has used.
Yesterday I discovered that this new garden has a claggy yellow clay soil in parts so I may well sharpen trowel and spade blades to help them work it with less resistance.
If you do find you have club root anywhere in your garden there are ways round it. Firstly you can use lime to counter act it and it's also good for brassicas even without club root. Sow brassicas in cells and grow them on into 4 or 5 inch pots so they have a really strong root system before you plant them out. You should then get a crop. Otherwise I believe it can take years for the active infectious fungus bits to die out - less in well drained soils and 10 or more in clay or damp soils.
The RHS has this info and advice - https://www.rhs.org.uk/Advice/profile?PID=128